Denise: Resetting/retuning your TV was a bad idea as you've now deleted a bunch of channels that were correctly tuned. There are no faults showing for any of the transmitters that serve your location, so start by checking for any loose or damaged cables or connections behind your TV, then along the aerial lead as far as you can safely access.

Bill Kocher & Mez: As your channels are already correctly tuned, retuning will not fix any problem like this. There was a fault affecting HD channels at Whitehawk Hill (and relays such as Brighton Central) yesterday morning, so this is likely to be related, especially as it is being reported to affect multiple viewers (I've seen reports of a similar problem in the same area on another website).

Darren: There are 6 versions of Channel 4 SD (not 20-30 as you claim) on satellite carrying different advertising regions (Channel 4 is also split into 6 region on Freeview) and 1 version of Channel 4 HD. Encrypted channels on satellite are not cheaper (someone has to pay for the encryption on top of the transponder capacity) and there are no separate encrypted versions of Channel 4 in either SD or HD for Sky viewers.

Following the announcement yesterday, Channel 4 confirmed that the removal of C4 HD and the All4 catchup service from Freesat is due to a dispute over charges levied by Freesat for channels to appear on their EPG. There has been no suggestion that Channel 4 HD will be encrypted or become a pay channel on Sky. See the statement from a Channel 4 spokesperson at the end of the article linked below:

Chris W: All the existing DAB rollout plans were completed last year (BBC national stations are at 97% coverage, D1 National and local muxes cover around 90% of UK population). It's expected that plans for further expansion to fill remaining DAB coverage gaps will only be announced once the government confirm the date for a digital radio switchover.

Chris W: Because if they were broadcast at a higher power level they would cause all sorts of problems with interference, both with reception from other UK transmitters as well as potentially causing interference for viewers in The Netherlands, Belgium and Northern France where there are transmitters operating on the same frequencies.

Keith Cunliffe : There has been no suggestion so far that any of Channel 4's other services will leave Freesat, although there is no long term guarantee that any particular channel will be available on Freesat (or any other platform).